niestradt



July 24, 1928.` A 1,678,267

E. S. NIESTRADT APPARATUS FOR MAKING MOLDS FOR BUILDING BLOCKS i FilJun14, 1927 I i 0 22 Z/ Patented July 24, 1928,

*UNIT un STA 7voi-friery.

nnuns'r s. urnsrnnnr, or nnuvnn, cononnno, nssreivon To 'Juinnonrnwnsrnnu ,TERRA corrie COMPANY, or oHIoAGo, ILLlNoIs'A conronnrrou'or Itrllursl APPARATUS FOR MAKING MOLDS FOR BUILDING BLOCKS.

Applicatign filed June 14, 1927. SerialvNo. 198,723.

My invention relates to `apparatus for making molds used in Athemanufacture lof building blocks of iplastic materials, and moreparticularly to certain new 'and useful improvements in the `apparatusshown and described in my application llier patent Serial No. 138,233,filedrSeptember 8, 1926.

The molds made by ymeans of the appa ratus Aas disclosed in the abovedescribed application V for patent, consist of" a ybase member, two side,members and two end members, separately ,formed oit plaster of Paris orother plastic material. The v side members are cast in knockdown moldspret-A erably made of metal Vand assembled upon a table or a workbench,and Vthe ibase member `or matrix member is made of a mass of softplaster' of Paris or the like on Ea work bench or slab, by drawing kaprolile templet across the 4surface thereon.

The end members of the mold are produced in forms vof whichthe base andside members assembled lin their relative `positions ,.-or casting Ithe.building blocks, are parts. n

It is with the method of `forming the end blocksthat the presentinventionris directly concerned; The several members .of the mold areconnected by xV-shaped tongues and grooves at ,their adjoining sidesandedges, but the side and,endnmembers are otherwise loosely `,supported onthe' base member. i

In producing the end members as stated hereinbetore, the side membersare placed u-pon the base member .and other devices hereinafter to/be,described .are positioned so as `to cooperate ,with the end portionsotthe base and side members to form molds kin which the lend members arecast. y l

The grooves and tongues which ,connect the,sid'cmembers withthe base arenot suitlicient to hold the side members against lateral displacementwhile the casts of the end pieces are being made, with the result thatunless locking means be provided to insure the rigidity of the sidemembers, the

expansion ot the plastic material used inv making the end pieces maycause the side members to move outwardly with the result that thedesired symmetry of the mold is destroyed.

It is the principal object of the present invention to provide inassociation with a mold of the above described character,

simple, practical and ellicient means to lock the side pieces of themoldagainst displaceh ment whereby to insure their rigidity while the end,pieces lor the mold are being cast. vA further object ofthe inventionresides in constructingthe locking `means so `as to be adjustablev tolit molds of dilerentsizes and proportions. i An embodiment oftheinventionihas :been illustrated in the accompanying drawings in which`like parts are correspondinglyiindicated throughout the views and in,which Figure 1 represents a plan view of the unfinished `mold in .its.condition for `casting the end members of the same, showing tlielocking appliance oi `the present invention in its operative position,j

,Figure 2, a section taken on the line 2-2, Figure 1, and Figure 3, avkfragmentary ,end view looking in the direction of thearrow A inFigureZ lReferring to the drawings, the :reference character5designatesa table or work bench upon which the mold lis supported. Themold comprises a base member and side members 17 `made by .theJhereinbeiore described methods. y i l rJlhe base member:has a `Riace`of fanciful form `for the ,production of building blocks of ornamentaldesign and the side imein'bers have 4at Itheir edges, tongues 7a whichlitin correspondingly .formedgrooves@a of the i base member.

The side members -z7` extend `in parallel relation ito each .other atright angles Vto the base ,member Vandfin order to cast the fend bers,:forms areniade ,byu the instrumentality' of upright boards or plates 9placed against the lend surfaces `et the base :and 'side niembers, andmetal partitions 10 placed between the side members parallel to theplates and at a distance therefrom equal to the desired thickness of theend members ot' the mold. These partitions may be made lengthwiseexpansible 'for their adaptation to molds oit different sizes and theyare supported by vertical legs or squares 12 upon the upper surface ofthe base member.

In the construction shown in the drawings, the partitions are composedof a middle section 14 consistingof two plates connected' by bolts 13,and end sections 15 which are (lll l s N) clamped between the plates ofthe middle section are provided with channelled flanges for theirconnection with the upright squares,

It is to be understood thatthe specific construction of the members sofar described is not a part of the present invention.

The locking means involved in the invention comprises a standard 16fastened in an upright position at a side of the table or work bench 5by means of a headed bolt 17 and a nut 1S screwed upon the threaded endthereof. The bolt may be secured beneath the top of the bench or tableby passing it through alined holes in opposite cleats thereof and thelower end of the standard may be inserted in a socket of a support 19upon which the bench or table stands. The nut 18 on the bolt is screwedagainst the standard to hold it in position.

Slidably mounted on the standard is a sleeve 20 which carries ahorizontally yproljecting arm 21. The arm extends across the mold abovethe side membersv 7 thereof and it carries a plurality of sliding stops22 which are each provided with a set screw 23 to secure them in theiradjusted positions on the arm. One of the stops cooperates with theportion of the sleeve 20 below the arm 21 to clamp the sideL member ofthe mold nearest the standard against lateral movement and two otherstops engage at opposite sides of the other side member of the moldand'thus perform a similar function with relation thereto.

It will be apparent that the attachment, as shown and described,provides a simple means for locking the side members of the mold intheir upright position and against lateral displacement, that thesliding sleeve and the sliding stops provide an adjustment 'to fit thedevice to molds of different sizes and proportions, and that if theserviceof the appliance is not desired, the entire device may be movedout of the way without detaching it from the table or work bench onwhich the mold is supported.

Variations in the construction and arrangement of the parts of theappliance may be availed of within the scope of the invention.

Having thus described my invention, what support;

3. A holding appliance '1er incid members comprising` in combinationwith a support for the mold, a standard on the support, an armprojecting laterally from 'the standard, sliding stops on the arm forengagement with members ofv a mold on the support,and means to securethe stops in adjusted positions. f

f1. A holding appliance for mold members comprising in combination witha support for the mold, a standard on the support, a

laterally projecting arm slidable on the sup-` port, sliding stops onthe arm for engagement with members'of a mold on the support, 'and setscrews to secure the stops in adjusted positions. f

A holding appliance for mold members comprising in combination with asupport for the mold, a bolt on kthe support beneath the top thereof, astandard having an aperture through which the bolt projects, a nut onthe bolt,'securing the standard, an arm projecting laterally from thestandard, and stops on the arm for engagement with members of a vmold onthe support.

6. A holding appliance for mold members comprising in combination with asupport for the mold, a standard on the support, a sleeve on thestandard,-a laterally yprojecting arm carried by the sleeve, a stop onthe arm cooperating with the sleeve to. hold a member of a mold onthe'support against lateral displacement, and stops on the arm tosimilarly hold another member of the mold.

In testimony whereof I have affixed my signature. c

`ERNEST S. NIESTRADT.

